The Denver City Council gave final approval to a ban on outdoor medical marijuana advertising on Monday night.The council voted 12-0 to ban marijuana dispensaries from advertising on billboards, bus benches or with sign-spinners.The ordinance doesn't affect print advertising or radio or television ads, but the ads would have to include the disclaimer that pot is "for registered Colorado medical marijuana patients only."In-your-face advertising offering cheap -- even free - weed had turned off residents and outraged some city leaders. "I don't appreciate folks that are out in front of a creepy old van slinging this dope, and they're making this industry look bad," Councilman Paul Lopez, who voted for the measure, said during a public hearing on the law last week."I'm sick and tired of my neighborhood being overrun by folks who don't respect it," he addedCouncilwoman Debbie Ortega and Councilman Chris Herndon sponsored the ordinance to prohibit sign spinners, banners and window advertisements."Some people are very offended by the sign spinners," Ortega said. "The signs and banners appear to target the general public instead of patients. Kids see them." The marijuana industry in Denver was itself deeply divided on the advertising ban, which requires one more vote next week but appears certain to pass. One Denver group, the Medical Marijuana Industry Group, actively pushed for the advertising ban, saying that unseemly ads give people a bad impression of the industry. Other industry groups, including the influential Cannabis Business Alliance, argued unsuccessfully that the advertising ban goes too far. "We don't necessarily need sign spinners on the side of the road. But we do need to opportunity to educate," said dispensary owner Cheri Hackett. Marijuana advertising is a murky area for regulators dealing with an industry whose very existence violates federal drug law. Medical marijuana is illegal to grow and sell, and also illegal to advertise, but regulations vary widely in the 17 states that flout federal drug law and consider pot legal for people with certain medical conditions. Delaware, Montana and Vermont ban marijuana advertising, though Montana's ban is under legal challenge. Washington state bans physicians from advertising that they recommend the drug. Doctors that violate that state's advertising ban can face sanctions from the state Department of Health. "A health care professional shall not ... include any statement or reference, visual or otherwise, on the medical use of cannabis in any advertisement for his or her business or practice," the Washington law reads. California and Colorado, two states known for their vibrant marijuana industries, are flush with advertisements for the drug. A U.S. attorney in San Diego last year vowed to crack down on companies that accept marijuana advertising in violation of federal drug law, but so far there have been no criminal charges brought. The U.S. attorney in Denver has told dispensaries near schools to close or face federal seizure, but he has not addressed advertising for the drug. A California weekly newspaper that accepts marijuana advertising, the Sacramento News & Review, once published a stand-alone publication devoted entirely to marijuana ads. An editor said the federal saber-rattling scared away some advertisers, but didn't affect the company's intention to accept the ads. "We're well within our legal and constitutional rights," Sacramento News & Review co-editor Nick Miller said. Colorado lawmakers have considered but rejected advertising regulations at the state level. Marketers that advise marijuana companies say they're treading lightly. Marijuana marketing is in its infancy, and companies are still tiptoeing around federal threats, said John Nicolazzo of the New York-based Medical Cannabis Network, which provides business services for the medical marijuana industry and owns more than 1,000 marijuana-related Internet domains. "Our industry has been under constant scrutiny, and advertising is a big part of that," Nicolazzo said. "It does kind of hinder us from going mainstream, to where we want to be." Nicolazzo said marijuana providers face tighter scrutiny than even alcohol and tobacco sellers, both of which have advertising limits. "What's the difference between advertising for marijuana or when you go to the gas station and they have sign for $1 off cigarettes? At nightclubs, they're handing out shots. When you try to compare alcohol and tobacco, there's a very thin line." But even some of marijuana's loudest advocates say advertising the drug is distasteful. Colorado's Lenny Frieling, an attorney and prominent marijuana legalization advocate, said marijuana shouldn't face special limits. "I don't think any medicines should be advertised, period, end of story. Whether it's medical marijuana or something that will give me an erection for eight hours, I find it all inappropriate," said Frieling, head of Colorado's chapter of the National Organization for the Reform of Marijuana Laws. "Ban it all or don't ban any of it, singling out marijuana is just willful ignorance." Most Denver council members disagreed, saying medical marijuana is a product that merits special limits. "We are still allowing advertising. We just don't want it in your face," said Denver Councilman Christopher Herndon, who voted for the measure.